No, he don't gotta have speed. He gotta get on base. He's OBPing at about .306, that's pathetic for a leadoff guy.
The classic answer: a guy who walks about 125 / 130 times a season, has about .400 OBP. Maybe an eye for the strike-zone so good that umpires let him call the close pitches. No swing = a ball. (Yes, that's Eddie Yost. He was real, and a few of us are old enough to have seen him.)